cowles



(No Model.)' 2 Sheets-Sheet 1.

G. 0. OOWLES.

DRIVE PULLBY.

No. 403,460. Patented May 14, 1889.

J2 y fgzo 2 Sheets-Sheet 2. G. G. GOWLES. DRIVE PULLEY.

(No Model.)

Patented May 14, 1889.

UNITED STATES.

PATENT OFFICE.

GEORGE C. COXVLES, OF EAST SAGINAWV, MICHIGAN, ASSIGNOR OF ONE-HALF TOED\VARD GERMAIN, OF SAME PLACE.

DRlVE-PULLEY.

SPECIFICATION forming part of Letters Patent No. 403,460, dated May Ia,ruse.

Application filed October 11, 1888. Serial No. 287,825. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE C. CowLEs, a citizen of the United States,residing at East Saginaw, in the county of Saginaw and State ofMichigan, have invented certain new and useful Improvements inDrive-Pulleys; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to I 0 which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters andfigures of reference marked thereon, which form a part of of thisspecification.

This invention relates to drive-pulleys, and particularly to theconstruction of parts whereby the pulley is made self-gripping to theshaft, and also in the construction of the parts whereby a section ofthe pulleymay be readily removed, so as to enable removing the pulleyfrom the shaft without disturbing the shaft in its bearings or any otherpulley that may be upon the same shaft.

The features of this invention are illus- 2 5 trated in the drawings asapplied to what is known as a wood pulley. The rim and web are made upof layers of thin wood glued together so as to cross the grain of eachlayer, thus forming a light and strong pulley.

The essential features of this invention will be pointed outparticularly in the claims.

In the accompanying drawings, forming a part of this specification,Figure 1 is a side plan of the pulley mounted on a shaft, some 3 5 partsbeing in section. Fig. 2 is an enlarged central section of Fig. 1, takenon the dotted line a: so. Figs. 3 and at are detail plans of thelocking-heads. Fig. 5 is a perspective of the pulley having thedetachable part removed. Figs. (3, 7, 8, and 9 are perspective views ofthe locking and detachable parts of the pulley, all of which will befully hereinafter set forth.

As indicated in the drawings, D represents the pulley; R, the flange; V,the central supporting-web. To said web and at the center of the wheelis secured on each side of the web a C-shaped metal flange or plate, F,as shown in Fig. 5, in which d represents the rivets. The flange-platesF are provided with the toothed or notched surfaces 11, and said plateshave integral therewith the journal box m, in which latter is placed thewood bushing 17'.

In Fig. 5, K represents the opening formed in the pulley by the removalof the part B of Fig. 6. The Web W is provided at the opening K 5 5 withthe channels or grooves z, and the main rim Rof the pulley is providedwiththe transverse grooves o", which, when the parts are coupled asshown in Fig. 1,1'eceive the transverse lips .2 on the detachableportion of the pulley. This detachable section B is provided with awebbed portion, \V, to register with the web \V of the main portion ofthe pulley when the parts are coupled as shown in Figs.

1 and 2. The web I is provided on its edges with the tongues f, whichfill the grooves .2 when the pulley is in its completed condition.

In Fig. 8, H represents a locking plate or head having on its oppositefaces the toothed or notched surfaces n,which register and engage withthe teeth of the flange-plates F, as shown in Fig. 1. S is acoupling-head having the central screw-threaded hole, 0, Thiscoupling-head has a stem, V, which passes through the locking-head H andis riveted or upset at 2. (See Fig. Projecting from the opposite face ofthe coupling-head is a screw-threaded stem, V.

In Fig. 7 is shown a second locking-head, H, which is constructed thesame as the head H, having the chamber 0. These lockingheads are securedtogether by passing the stem V of the head S through the hole h of thelocking-head H and applying the nut as shown in Figs. 3 and 4.

Fitting into the chamber c, formed within the joined locking heads orplates, are the upwardly-extending wings 5 of the metal saddle or yokeS. The horizontally-projecting ends 4 of the yoke are concave-convex.The 0 curvature or concave at 8 is of less diameter on a horizontal thana vertical line. (See Fig.

1.) The object will be hereinafter set forth.

In Figs. 1, 2, and 6 it will be observed that the web W is provided withan opening, t, 5 leading horizontally through the web. Passingvertically through the web and at right angles to. the opening is thehole 7. This hole receives the upper end of the bolt B, having the nuta. At or near the center of I00 the bolt B and made fast thereto is thecollar or nut a. The lower screw-threaded end, 3'', of this bolt entersthe hole 0' of the coupling-head S, as shown in Figs. 1, 2, and 4,whereby all parts are locked together, as shown in Figs. 1 and 2..

In Figs. 1 and 2, 0 represents the main or drive shaft, to which thepulley is made fast by placing under the yoke S and on the shaft 0 themetal corrugated or friction roller P. The detachable parts beingremoved from the wheel, as shown in Fig. 5, the wheel is applied to theshaft 0 by passing it so as to allow the shaft to pass through theopening K and meet the journal-box, as shown in Figs. 1 and 2. ThesaddleS is then placed over the shaft, with the corrugated roller Pcentrally under it, as shown in Fig. 1. The locking-heads H H are thenengaged with the teeth of the flanges F, the bolt B being screwed intothe coupling-head S, as shown in Fig. 2. The detachable section B isthen dropped into place, closing the gap. The nut a being applied to theupper end of the bolt B, the locking-heads and section are firmly andrapidly secured together, thereby completing the pulley and theattaching of it to the shaft.

It will be observed on looking at Fig. 1 that greater space between thesaddle and the shaft for the roller P to lie in is directly at thecenter over the shaft, and that the curvature of the saddle at 8 isshorter or less than at the shaft 0. By this arrangement a partialrotation of the pulley on the shaft causes the roller P to travel in thenarrow space,

' whereby the pulley becomes firmly attached to the shaft and maybereleased by a partial rotation, so as to bring the roller P back to theposition shown in Fig. 1. In this position the pulley may be moved alongon the shaft to change its location horizontally on the shaft.

To remove the pulley from the shaft it is first rotated, so as to loosenthe roller P. Then the nut a is removed from the bolt B. The part B isthen drawn out of the pulley, as shown in Figs. 5 and 6. Thelockingheads and the saddle are then removed, when the pulley may beremoved from the shaft and without disturbing any of its bearings orsupports.

Having thus fully set forth my invention, what I claim as new, anddesire to secure by Letters Patent, is

l. A pulley having an opening leading from its periphery to its center,which opening is adapted to receive removable parts, the C- shaped andtoothed flange-plates having the journal-bearing formed integraltherewith, the yoke, the toothed locking-heads, the coupling-head, thedetachable section B, and bolt coupling said section to thecoupling-head.

2. In a removable and self-gripping pulley, the main portion having anopening leading from the peripheryto its center, the web W, having thegrooves z, the toothed flangeplates F, having the journal-box m, thewood bushing therein, the yoke, the corrugated roller, the toothedlocking-heads, the coupling-head, the section B, having the tongues fattached thereto, and the bolt and nut coupling thepart B to thecoupling-head, as and for the purposes specified.

3. The herein-described pulley, comprising the following elements: themain portion having the central web, W, provided with the channels 2therein and the transverse grooves 13 in the rim, the flange-plateshaving the toothed faces n and journal-box m, the wood bushing, themetal yoke S, the roller 19, the locking-heads having the toothed facesn, the coupling-heads S, the section B, having the lips z and thetongues f, and the bolt B, adapted to pass through the web of thesection B and having a nut at .its upper end, the lower end of said boltengaging with the coupling-head, substantially as and for the purposesspecified.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE c. OOWLES.

Witnesses:

GEORGE P. ROBBINS, EDWARD W. GLYNN.

